System for testing accuracy of electronic compass

Details System for testing accuracy of electronic compass System for testing accuracy of electronic compass

2011-08-02

2011-08-02

Johnson, Amy Cohen (Department: 2841)

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

C033S358000, C033S362000, C702S092000

Reexamination Certificate

active

07987606

ABSTRACT:
A system for testing the accuracy of an electronic compass is disclosed. The system includes a circular track, a compass seat, an electromagnetic element, a driver, a power source, a calculator, and a magnetic shielding chamber. The electromagnetic element is disposed on the circular track and powered by the power source to generate a magnetic field. The electronic compass is installed on the compass seat and surrounded by the circular track. As such, the electronic compass can measure the magnetic field of the electromagnetic element and calculate direction relative to the electromagnetic element at different points of the circular track when the electromagnetic element is driven by the driver to move along the circular track. The magnetic shielding chamber is for shielding the electromagnetic element and the electronic compass from interference of external magnetic fields.

REFERENCES:
patent: 4232451 (1980-11-01), Thomsen
patent: 5095630 (1992-03-01), Nomura et al.
patent: 5440484 (1995-08-01), Kao
patent: 7895759 (2011-03-01), Hu

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